UL ratings

Engineering and Architectural Data
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UL Ratings

Underwriters Laboratories

Select any of the UL Codes below to view them at the UL Laboratories Online Certifications Directory.

Roof-Ceiling Designs
UL Code Application/Hour Rating
Design No. P536 Roof-Ceiling; 1, 1.5, 2 Hr.
Design No. P537 Roof-Ceiling; 1, 1.5 Hr.
Design No. P540 Roof-Ceiling; 1 Hr.
Design No. P543 Roof-Ceiling; 2 Hr.
Design No. P550 Roof-Ceiling; 1, 1.5, 2 Hr.
Design No. P553 Roof-Ceiling; 1 Hr.
Floor-Ceiling Designs
UL Code Application/Hour Rating
Design No. G546 Floor-Ceiling (Concrete and Steel Joists); 1,2 Hr.
Design No. G567 Floor-Ceiling (Concrete and Steel Joists); 1,2 Hr.
Design No. G569 Floor-Ceiling (Concrete and Steel Joists); 1.5,2 Hr.
Design No. G570 Floor-Ceiling (Concrete and Steel Joists); 2 Hr.
Design No. G571 Floor-Ceiling (Concrete and Steel Joists); 2 Hr.
Design No. G576 Floor-Ceiling (Concrete and Steel Joists); 2 Hr.
Design No. L560 Floor-Ceiling (Wood or Combination wood and Steel Joist Assemblies); 1 Hr.
Design No. L565 Floor-Ceiling (Wood or Combination wood and Steel Joist Assemblies); 1 Hr.
Design No. L597 Floor-Ceiling (Wood or Combination wood and Steel Joist Assemblies); 1 Hr.
Design No. L599 Floor-Ceiling (Wood or Combination wood and Steel Joist Assemblies); 1.5 Hr.
Design No. M507 Floor-Ceiling (Wood or Combination wood and Steel Joist Assemblies); 1 Hr.